高可见光响应型单斜介孔BiVO4的合成与表征

doi:10.3724/SP.J.1077.2011.01256

无机材料学报 ›› 2011, Vol. 26 ›› Issue (12): 1256-1260.DOI: 10.3724/SP.J.1077.2011.01256 CSTR: 32189.14.SP.J.1077.2011.01256

高可见光响应型单斜介孔BiVO₄的合成与表征

肖奇, 高兰, 张响

(中南大学资源加工与生物工程学院长沙 410083)

收稿日期:2010-12-28 修回日期:2011-02-21 出版日期:2011-12-20 网络出版日期:2011-11-11
基金资助:
中南大学研究生创新项目(2009ssxt242); 中南大学米塔尔大学生创新创业项目(10MX14)

Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO₄

XIAO Qi, GAO Lan, ZHANG Xiang

(School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China)

Received:2010-12-28 Revised:2011-02-21 Published:2011-12-20 Online:2011-11-11
Supported by:
Graduate Education Innovation Projects of Central South University (2009ssxt242); Mittal Steel Funding for University Students Innovative and Venture projects at Central South University (10MX14)

摘要/Abstract

摘要： 利用纳米铸造法, 以立方有序介孔分子筛MCM-48为硬模板, 550℃成功制备了结晶良好的纯相单斜介孔BiVO₄. 采用XRD、TEM、BET及UV-Vis光谱分析对样品的结构进行了表征, 结果表明: 与水热法制备的大颗粒样品相比, “纳米铸造”介孔BiVO₄的平均孔径为16.8nm, 孔体积为0.1 cm²/g, 比表面积高达22.9 m²/g, 有效减少了光生电子和空穴复合的几率, 在可见光范围内表现出优良的可见光催化活性, 90min内对乙基黄原酸钾的光催化降解率高达78%.

关键词: 纳米铸造, BiVO₄, 介孔, 光催化, MCM-48

Abstract: Ordered nanocrystalline mesoporous BiVO₄ with pure phase was successfully synthesized at 550℃ via nanocasting using cubic MCM-48 molecular sieves as hard template. The long-range ordered mesostructure was characterized by XRD, TEM, BET as well as UV-Vis spectrophotometer. Compared with the BiVO4 synthesized by conventional hydrothermal method, the nanocasting mesoporous BiVO4 has the average pore diameter of 16.8nm, pore volume of 0.1 cm³/g and specific surface area up to 22.9 m²/g. The structure decreases the recombination of optical excitation electrons and holes efficiently, so the mesoporous BiVO₄ has an excellent photocatalytic activity in the visible light region. As a result, the photocatalytic efficiency of mesoporous BiVO₄ for xanthate in 90min reaches 78%.

Key words: nanocasting, BiVO₄, mesoporous, photocatalysis, MCM-48

中图分类号:

O643

肖奇, 高兰, 张响. 高可见光响应型单斜介孔BiVO₄的合成与表征[J]. 无机材料学报, 2011, 26(12): 1256-1260.

XIAO Qi, GAO Lan, ZHANG Xiang. Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO₄[J]. Journal of Inorganic Materials, 2011, 26(12): 1256-1260.

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高可见光响应型单斜介孔BiVO₄的合成与表征

Synthesis and Characterization of Highly Visible-light Active Monoclinic Mesoporous BiVO₄

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